Why Code Quality Audits Are the Coin Grading of M&A Technical Due Diligence
December 5, 2025Decoding Coin Grading Supremacy: The Strategic Importance of PCGS-CAC MS-70 Specimens
December 5, 2025I Ran Into This Exact Issue – Here’s How I Solved It
Ever found yourself down a numismatic detective hole chasing what should be a simple answer? That’s exactly where I landed when trying to identify the highest graded PCGS coin with CAC certification. Like many collectors, I assumed modern issues like Eisenhower Dollars would dominate the PR69DCAM category – but the truth proved far more fascinating.
After weeks of cross-referencing auction records and population reports, I developed a reliable verification method. Let me walk you through exactly how I cracked this case.
Step 1: Starting with Heritage Auctions
My first breakthrough came unexpectedly while sipping coffee at 2 AM. Heritage Auctions’ archives became my secret weapon. Here’s how you can replicate my approach:
Navigating the Heritage Search Interface
- Head to HeritageAuctions.com and click “Advanced Search” (I nearly missed this step initially)
- Apply these filters: “PCGS Certified” + “CAC Approved” + “Graded MS/PR 69”
- Sort by “Price Realized (High to Low)” – this revealed surprises immediately
That’s when this beauty popped up, changing my entire search trajectory:

Key Discoveries at Heritage
- The stunning 1865 Three-Cent Piece you see above commanded $16,800 in August 2023
- An 1884 Gold Dollar graded MS69 CAC that made me reconsider 19th-century rarity
- Multiple Morgan Dollars at MS68+ CAC – but no MS69s despite my initial assumptions
Step 2: Consulting CAC Population Reports
This changed everything. CAC’s verification tools revealed gaps in my auction-based research that shocked me.
How to Read CAC Population Reports
- Visit CACCoin.com and navigate to “Population Reports” (look for the tiny link in the footer)
- Filter by “Highest Grade” and “PCGS” – this took me three attempts to get right
- Export to CSV for analysis (I use Google Sheets for this)
Pro Tip: CAC reports show not just grades but how many coins earned their “green bean” approval at each level – crucial for verifying true rarity. I learned this the hard way after misjudging several listings.

This $3 Gold Piece from the CAC reports made me gasp – a coin I’d completely overlooked in my Heritage searches.
Step 3: Verifying with Physical Evidence
Nothing compares to seeing these coins in person. At the 2024 FUN Show, I spent hours examining potential candidates:
Firsthand Verification at Coin Shows
Three standouts passed my inspection:
- 1880s Gold Dollar (MS69 CAC) – similar to the one in Tom Bender’s display case
- 1986-S Silver Eagle (PR69DCAM CAC) with incredible cameo contrast
- 1955 Double Die Lincoln Cent (MS69BN CAC) that made me question everything I knew about copper preservation
Step 4: Addressing Common Misconceptions
Throughout my research, I kept bumping into these false assumptions:
Myth #1: Modern Coins Always Dominate High Grades
While 1986-S Silver Eagles frequently hit PR69, I discovered numerous 1800s coins achieving MS69 with CAC approval – including that eye-opening 1865 Three-Cent Piece.
Myth #2: MS70 is the Ultimate Prize
Here’s what surprised me most: CAC is significantly more selective with MS69/PR69 approvals than MS70s in many series. That MS69 CAC coin in your collection might be rarer than you think!
The Definitive Answer (With Proof)
After months of detective work, here’s what my notebook revealed:
Current Highest Graded PCGS/CAC Coins
- 19th Century Star: 1865 Three-Cent Piece (MS69 CAC)
- Gold Standout: 1884 $1 Gold (MS69 CAC)
- Modern Champion: 1971-S Eisenhower Dollar (PR69DCAM CAC)

Maintenance and Future Verification
Coin populations change constantly. Here’s my monthly ritual to stay current:
My Monthly Verification Routine
- First Monday: Coffee + Heritage’s new CAC listings
- 15th of month: Download updated CAC population reports
- Quarterly: Hands-on inspections at major shows
Conclusion: Why This Matters for Collectors
This journey taught me more than just which coins top the grading charts. What sticks with me most:
- Auction archives + population reports = verification gold
- Nothing replaces examining coins in hand under good light
- Our 19th-century predecessors created masterpieces that rival modern minting quality
The numismatic landscape constantly evolves, but this approach will help you identify true PCGS-certified, CAC-approved rarities – the coins that define the pinnacle of our hobby.
Related Resources
You might also find these related articles helpful:
- Why Code Quality Audits Are the Coin Grading of M&A Technical Due Diligence – When Technical Debt Sinks Deals In tech acquisitions, the difference between a hidden gem and a polished turd often come…
- Strategic Leadership in Technology: How Counterfeit Half Dollars Mirror CTO Risk Management – My Unexpected Teachers: How Rare Coins Shaped My Approach to Technology Leadership In my 15 years as a CTO, I’ve d…
- From Code Analysis to Courtroom: How Technical Expertise in Counterfeit Detection Launches Expert Witness Careers – From Debugging to Depositions: How Tech Skills Lead to Courtroom Careers When software becomes evidence, attorneys need …